Defense attorneys in the Colorado theater shooting case are again asking the judge to delay the trial, less than two weeks before jury selection is set to begin.

James Holmes' lawyers said in court filings Wednesday that they need more time to review massive amounts of evidence. They say they need at least four to six weeks to research three new prosecution witnesses and could hire additional experts.

Judge Carlos A. Samour Jr. did not immediately issue a ruling.

Holmes pleaded not guilty by reason of insanity to charges of killing 12 people and injuring 70 in the 2012 attack at a Denver-area theater.

Jury selection is scheduled to start Jan. 20. If the trial is postponed again, the new date would be the sixth one set for the case.